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On 11/18/2012 11:36 AM, John Cowan wrote:
Here are the individual comments on SRFI 107 that have occurred to me so far:
Thanks for the feedback!
1) Attribute names and values cannot be replaced by enclosed expressions. That should be allowed.
They can, unless I'm missing your point: The attribute name is given by an xml-name-form, which can be an xml-enclosed-expression. Likewise, xml-attribute-value can contain xml-escaped. What is not supported explicitly are attribute-valued expressions. One could extend xml-true-attribute to: xml-true-attribute ::= xml-name-form=xml-attribute-value | xml-enclosed-expression where xml-escaped would be an expression that evaluates to an attribute value.
2) It should be made clear early that the lexical syntax does not allow whole XML documents to be inserted. I'll send another email suggesting a way to represent whole documents.
3) It should also be made clear early that the lexical syntax is a superset of XML syntax.
I can change the abstract to: We specify a reader extension that reads data in a superset of XML/HTML format, and produces XML-node values. If we drop the semantics parts as you recommended earlier, then perhaps: We specify a reader extension that reads data in a superset of XML/HTML format, and produces conventional S-expressions.
4) I believe that the namespace mapping passed to $xml-element$ should be wrapped in (quote ...) in order to lift the restriction that $xml-element$ needs to be a macro rather than a procedure.
I don't believe that works - at least it might cause major problems. The namespace mappings provide bindings that should be visible inenclosed expressions. So at least in the my use-case $xml-element$ has to be a macro. Though one could still wrap the namespace list in quotes to support some use-cases that don't need that, and then applications that want to support
true lexical namespace bindings can just strip the quotes in the macro.
5) Change $resolve-qname$ and $entity-reference$ to $xml-resolve-qname$ and $xml-entity-reference$ for uniformity. I realize that in Kawa QNames have a wider scope than just XML, but that won't necessarily be true in other implementations of SRFI 107. If these forms seem too verbose, $xml-qname$ and $xml-entity$ work for me.
In XML terminology, an "entity" is a "piece of text" - for example a file or a string. An entity reference is an identifier that resolves to an entity. So I'm not sure ($xml-entity$ NAME) would be a good idea. I don't mind a slightly more verbose $xml-entity-reference$. -- --Per Bothner per@xxxxxxxxxxx http://per.bothner.com/